I’ve been making these nerdy CafePress products for many years. The most “popular” idea I came up with was a pin that denounced ensemble averaging in favor of single-molecule spectroscopy. (At some point in 2006, I saw random science folks wearing my buttons and they claimed that someone their lab made them, so I added the copyright. But I’m more than happy to have other people “borrow” the design.)

I used to own a car with several of these bumper stickers on it, and I thought I was a super-nerd. Well, I’ve been way out-nerded: a friend (Jan Lipfert via Adam Cohen) emailed me these photos from BPS in Philly.

Update: It’s Yale E. Goldman. Apparently, he needed to cover a big scratch! Best. Reason. Ever. A tractor trailer veered into his lane and the wheel scrapped away his paint. He sent me this before-and-after: